Drug interactions
Levodopa + Triamterene
Severity: Moderate
Levodopa and Triamterene: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Levodopa can cause orthostatic hypotension, which may be additive with the blood pressure lowering and volume depletion from triamterene. Patients may experience dizziness or falls, especially early in treatment.
What this interaction means in plain words
Levodopa and Triamterene can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Levodopa belongs to Central Nervous System; Triamterene belongs to Cardiovascular.
Why it happens
Additive hypotensive effects through dopaminergic vasodilation and diuretic-related volume reduction.
What to do
Monitor sitting and standing blood pressure when starting or adjusting levodopa, and reduce the diuretic or antihypertensive dose if symptomatic.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Triamterene
- Amiloride + Triamterene Contraindicated
- Eplerenone + Triamterene Contraindicated
- Potassium citrate / citric acid + Triamterene Contraindicated
- Potassium citrate + Triamterene Contraindicated
- Spironolactone + Triamterene Contraindicated
- Aceclofenac + Triamterene Major
Other interactions of Levodopa
- Isocarboxazid + Levodopa Contraindicated
- Levodopa + Phenelzine Contraindicated
- Levodopa + Phenelzine (nonselective MAOI) Contraindicated
- Levodopa + Procarbazine Contraindicated
- Levodopa + Tranylcypromine Contraindicated
- Amisulpride + Levodopa Major
Frequently asked questions
Can I take Levodopa with Triamterene?
MediHelp rates the interaction as moderate. Levodopa and Triamterene can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Levodopa can cause orthostatic hypotension, which may be additive with the blood pressure lowering and volume depletion from triamterene. Patients may experience dizziness or falls, especially early in treatment.
How serious is the interaction between Levodopa and Triamterene?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor sitting and standing blood pressure when starting or adjusting levodopa, and reduce the diuretic or antihypertensive dose if symptomatic.
What other medicines interact with Triamterene?
MediHelp also lists interactions of Triamterene with, for example, Amiloride, Eplerenone, Potassium citrate / citric acid. The full list is on the Triamterene page.
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